| 摘要 |
<p>486,128. Road studs. LLEWELLYN, J. B., and TAYLOR, M. L. Dec. 23, 1936, No. 35228. [Class 3 (ii)] [Also in Group X] A road stud, plate, or the like of cast iron comprises a top plate a, depending triangular side plates b and strengthening webs c and is provided with a central hole d in the top plate to allow air to escape when the stud is pressed into plastic material. The top plate may be detachable.</p> |
